Cut-off nozzle



(No Model.)

C. T, HOLLUWAY.-

GUT-OPF NozzLB;

Patented Apr. 1, 1884.

NA PETERS. Phglawhngnphm. washington, D, I2.

i nozzle directly to the coupling B of the hose,

Ythe nozzle to the hose or other source of snp- NigTnn STATES PATENT @Trina CUT-OFF EPBCIFICATON forming part of Letters Nozz-LE.

Patent No. 296,172, dated .April l, 1S8l.

Application filed September S, 1863. (No model.)

.To LZZ whom, t may concern,.-

Be it known that I, GHAnLnsT. l-IoLLowAY, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invent ed certain new and useful Improvements in Cut-Off Nozzles, of which the following is a specification.

The object of my invention is to provide a cut-ott' nozzle adapted to prevent the liquid which passes through it from gaining access to the working parts or screw which connects ply, and which shall also be adapted or provided'with means to control the discharge of the liquid. lily improved nozzle is particu larly desirable for use with chemical `tire-extinguishcrs.

`The invention will lirst be described, then designated in the claim.

In the annexed drawings, which illustrate the invention, Figure l is a longitudinal seo tion. Fig. 2 is cross-section on the line z fr, Fig. l. Fig. 3 is a side View of the intermediete coupling. Fig. d is a View of thc loose collar, showing the recess therein and the eccentric rims.

The letter A designates the discharge end of the nozzle, i the screw end, by which the nozzle is attached; B, ordinary hose, and B the screw collar or coupling which the ends of hose are usually provided with.

Instead of attaching the screw end A of the an d I provide an intermediate coupling, C, which has a female screw, d, for attachment to the hose-coupling, and a male screw, e, for attachnient to the nozzle. J ust below the male screw e are two holes, f, in the neck. These holes are diametrically opposite each other. A hat flange, It projects laterally on a plane with the lower edge of the holes, and its rim 1L is circular. A metal block, g, is fitted in and is adapted to -slide in and out of each hole, and when out is in contact with the dat flange. A loose collar, E, has its rim knurled to facilitate its being turned or rotated, and has on one side a recess with a circular wall, h2, concentric with the lrnurled rini. The ilat circular flange h occupies the recess. When the collar is rotated, the wall Ir of the recess will turn loosely around theriin h ofthe flange.

The central part of the collar is entirely cut out to set down around the male-screw neck. The cut-out part leaves two half-circular eccentric rims, r. Then the collar 'is in position, each of these eccentric rims comes on the outer side of one of the blocks g. lt will be seen that when the blocks project out of their holes f the projecting part inust occupy the wide part 7s of the space formed' by the hali circular eccentrics. Now, when the collar is partly rotated, the eccentric rims gradually press both blocks into their holes and toward each other. The holes c, having the blocks g fitted into thcn1, and the collar having two half-circular eccentric rims to compress the blocks together, constitute the metal parts of the means to control the discharge of liquid. A rubber tube, a, has one end Jdared to forni a washer, a', which tits between the end of the screw-coupling B on the hoseand the seat of the female screw d on the intermediate coupling. The rubber-tube lining, with the washer l formed at its end, is applicable whether the intermediate' coupling be used or not. It will thus be seen the liquid passing through the hose enters the dared end of the rubber tube.

rlhis rubber tube continues through the intermediate coupling and through the nozzle to near the discharge end. The end ofthe flexible tuberests against a shoulder, p, formed inside of the nozzle. By this arrangement the ilexible tube constitutes a lining for the nozzle, and the liquid passes through the iiext ble tube, being thereby prevented from gain ing access to the screw which couples the nozzle. The screw-coupling is thus protected from the action of the chemicals used in lire-extinguishers. When the two blocks g are compressed toward each other, they press the walls of the flexible tube together, and thereby Vcompletely stop the passage of the liquid. The metal parts, which control the discharge oi' the liquid, not being accessible to, are therefore not injnriously affected by, the chemical liquid.

I regard the so-called intermediate coup ling,77 C, as a part ofthe nozzle.

l do not claim, broadly, a nozzle having sliding blocks and a rubber-tube lining, but claim the construction as hereinafter stated.

Having described my invention, l claim IOO Io cular Wall, h2, and with its center entirely cut out, forming tWo internal eccentric r1ns,-c, Which bear on the outside of the said blocks7 as shown and described.

In testimony WhereofI afiix my signature in presence of two witnesses.

CHARLES T. HOLLOVAY.

Witnesses:

JN0. E. Monnis, JNO. T. MADDoX. 

